The Ocean 



23 



23°40' 



23° 20' 



67^20 67°40 . 



Interval between contours=50fathoms 

 Fig. 14. Submarine valley off the mouth of the Indus. 



E 12° 20' 



Tnfervol between contours = 50 tbtfioms 

 Fig. 15. Submarine valley of the Congo. 



